Alkylphenol sulfoxides



Patented July 10, 1951 UNITED STATES PATENT OFFICE ALKYLPHENOL SULFOXIDES Wendell S. Cook, Houghton, Mich., assignor to The Firestone Tire & Rubber Company, Akron, Ohio, a corporation of Ohio No Drawing. Application June 29, 1949,

Serial No. 102,153

1 Claim. 1 This invention relates to alkylphenol sulfoxides.

These new compounds are believed to have the following type formula Example 1 i A sample of 71.6 grams of his (6-tert-butyl-3- methylphenol) sulfide was dissolved in 800 cc. of glacial acetic acid. To this solution 24 grams of thirty percent hydrogen peroxide were added and the resulting reaction mixture was allowed to stand seven days. The mixture was then diluted to 2 liters and the resulting precipitate was filtered and recrystallized twice from methanol to produce 59 grams of white crystalline material having a melting point of 179 C.

The following analysis indicates the substance to be the sulfoxide of the starting material:

Per cent calculated for gi f OzzHaoOaS Sulfur 8. 66 8. 31 Carbon 70. 60 70. 45 Hydrogen 8. 7. 94

Example 2 A sample of 23.5 grams of bis (4,6-di-tertbutyl-3-methylphenol) sulfide was dissolved in 4 liters of hot acetic acid. The resulting solution was cooled and 5.6 grams of thirty percent hydrogen peroxide were added. On proceeding as in Example 1 above, a yellow crystalline material was obtained having a melting point of 163 C. That this material was the sulfoxide was indicated by the following analytical results:

Per cent calculated for gfig GaoHnOsS Sulfur l 6. 58 6. 58

Mono-, di-, tri-, and tetra-alkyl phenol sulfoxides may be prepared in the manner illustrated above. Additional examples of the invention are as follows:

Bis (4,6-dimethy1phenol) sulfoxide Bis (3,4,6-trimethylphen0l) sulfoxide Bis (3,4,5,6-tetramethylphenol) sulfoxide Bis (4,6-diethylphenol) sulfoxide Bis (3,4-dioctylphenol) sulfoxide Bis (4-methyl-6-octy1phenol) sulfoxide Bis (3,5-dimethy1phenol) sulfoxide The above examples are illustrative of the compounds which may be prepared, but the invention is not limited thereto. So too, the compounds of this invention may be prepared by other methods as, for example, by reacting a phenol having the desired degree of alkylation with thionyl chloride.

What is claimed is:

Bis (4,6-di-tert-buty1-B-methylphenol) oxide.

sulf

WENDELL S. COOK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,385,899 Weijlard et al Oct. 2, 1945 2,402,448 Richards June 18, 1946 2,499,822 Gilbert et al Mar. 7, 1950 OTHER REFERENCES Gazdar et al.: Jour. Chemical Soc. (London), vol. 97, page 2250 (1910). 

